JAJSM99A July   2021  – July 2021 TPS548B27

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Internal VCC LDO and Using External Bias on VCC Pin
      2. 7.3.2  Enable
      3. 7.3.3  Output Voltage Setting
        1. 7.3.3.1 Remote Sense
      4. 7.3.4  Internal Fixed Soft Start and External Adjustable Soft Start
      5. 7.3.5  External REFIN For Output Voltage Tracking
      6. 7.3.6  Frequency and Operation Mode Selection
      7. 7.3.7  D-CAP3 Control
      8. 7.3.8  Low-Side FET Zero-Crossing
      9. 7.3.9  Current Sense and Positive Overcurrent Protection
      10. 7.3.10 Low-Side FET Negative Current Limit
      11. 7.3.11 Power Good
      12. 7.3.12 Overvoltage and Undervoltage Protection
      13. 7.3.13 Out-Of-Bounds (OOB) Operation
      14. 7.3.14 Output Voltage Discharge
      15. 7.3.15 UVLO Protection
      16. 7.3.16 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Auto-Skip Eco-mode Light Load Operation
      2. 7.4.2 Forced Continuous Conduction Mode
      3. 7.4.3 Powering the Device from a 12-V Bus
      4. 7.4.4 Powering the Device from a 3.3-V Bus
      5. 7.4.5 Powering The Device from a Split-rail Configuration
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1  Output Voltage Setting Point
        2. 8.2.2.2  Choose the Switching Frequency and the Operation Mode
        3. 8.2.2.3  Choose the Inductor
        4. 8.2.2.4  Set the Current Limit (TRIP)
        5. 8.2.2.5  Choose the Output Capacitor
        6. 8.2.2.6  Choose the Input Capacitors (CIN)
        7. 8.2.2.7  Soft-Start Capacitor (SS/REFIN Pin)
        8. 8.2.2.8  EN Pin Resistor Divider
        9. 8.2.2.9  VCC Bypass Capacitor
        10. 8.2.2.10 BOOT Capacitor
        11. 8.2.2.11 PGOOD Pullup Resistor
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10レイアウト
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 サポート・リソース
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

6.6 Typical Characteristics

Figure 6-1 Efficiency vs Output Current, 12 VIN, 800 KHz, DCM, VCC = Int
GUID-C5BB154B-1974-400B-98EF-2684B38A299E-low.gif
VIN = 12 V VOUT = 1 V Int Vcc
300 nH 800 Khz
Figure 6-3 Safe Operating Area, VOUT = 1.0 V
GUID-9FE1FB6B-400F-48DA-8974-BCCA6A308B56-low.gif
VIN = 12 V VOUT = 1 V Ext Vcc 3.3 V
300 nH 800 Khz
Figure 6-5 Safe Operating Area, VOUT = 1 V
Figure 6-7 Output Voltage vs Output Current
GUID-204EA3B2-BB5F-49C4-BFF3-2D405991C3D8-low.gif
VIN = 12 V IVCC = 2 mA
Figure 6-9 VCC LDO vs Junction Temperature
GUID-20210413-CA0I-MDM6-GPRB-PJZGBZQBJ4TV-low.pngFigure 6-11 Load Transient
GUID-20210413-CA0I-DMCD-M23T-QJ4JZGQJW6VR-low.pngFigure 6-13 Enable Power Up, Skip
GUID-20210413-CA0I-JB8P-HM4H-RPHQ5Q9XB7XZ-low.pngFigure 6-15 Enable Power Up, Pre-Bias
GUID-20210413-CA0I-CPWX-JDX6-WPCH2BH5ZVJH-low.pngFigure 6-17 VOUT Ripple, FCCM, 0-A Load
Figure 6-2 Efficiency vs Output Current, 12 VIN, 800 KHz, DCM, VCC = EXT 3.3 V
GUID-3E45439E-EF62-4F3B-8AA5-720B12569654-low.gif
VIN = 12 V VOUT = 5 V Int Vcc
800 nH 600 Khz
Figure 6-4 Safe Operating Area, VOUT = 5 V
GUID-19F331C3-B461-44F8-98E7-54F643DE8F3A-low.gif
VIN = 12 V VOUT = 5 V Ext Vcc 3.3 V
800 nH 600 Khz
Figure 6-6 Safe Operating Area, VOUT = 5 V
GUID-72A11E1B-2247-48DB-A2BD-C7BD4DBCB5AB-low.gif
VIN = 12 V VEN = 0 V Internal VCC LDO
Figure 6-8 ISD(VIN) vs Junction Temperature
GUID-CC3F82F3-685F-4002-9B73-1A8B0A138678-low.gif
VIN = 12 V
Figure 6-10 ISS(source) vs Junction Temperature
GUID-20210413-CA0I-HCBG-L2WC-S6VDLRDMPZ72-low.pngFigure 6-12 Unload Transient
GUID-20210413-CA0I-5GST-MDWM-9QPZKV1VBV63-low.pngFigure 6-14 Enable Power Down, Skip
GUID-20210413-CA0I-JCZ5-97CL-BFJVBHFL1PGF-low.pngFigure 6-16 VOUT Ripple, FCCM, 20-A Load
GUID-20210413-CA0I-ZFZZ-3F6C-MSJH3L1M6QFP-low.pngFigure 6-18 VOUT Ripple, Skip Mode, 10-mA Load